回收料液和生物炭,以改善木片生物反应器的酸盐去除
Yuchuan Fan1, Michael Essington2, Jie Zhuang3
1Everglades Research and Education Center, University of Florida, Belle Glade, FL, 33430, USA; Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL, 32611, USA; Biosystems Engineering and Soil Science Department, University of Tennessee, Knoxville, TN, 37996, USA.
Journal of environmental management
|August 4, 2023
概括
回收生物炭和化物液等废物材料显著增加了木片生物反应器 (WBR) 中的酸盐去除. 这种组合增强了脱,为水处理提供了可持续的解决方案,并提高了酸盐去除效率.
科学领域:
- 环境工程环境工程
- 水处理技术水处理技术
- 废物管理 废物管理
背景情况:
- 木片生物反应器 (WBR) 对于从农业排水中去除酸盐至关重要.
- 由于填充材料的性能和可变的酸盐度,WBR的效率往往受到限制.
- 提高WBR中的脱化需要优化条件和碳来源.
研究的目的:
- 调查回收生物炭 (B) 和灌液 (SL) 的有效性,以提高WBR中酸盐去除效率 (NRE) 和酸盐去除率 (NRR).
- 评估B和SL对生物反应器条件的影响,包括溶解氧,液压导电性,pH和溶解有机碳.
- 确定B和SL的最佳组合,以在实验室生物反应器中增强脱化.
主要方法:
- 建造和运行12个实验室规模的生物反应器,使用各种填充材料 (WBR,WBR+B,WBR+SL,WBR+B+SL).
- 在不同的液压保留时间 (HRT:0.5-24小时) 和酸盐度 (5.4-33毫克L-1) 下进行测试.
- 使用结构方程建模 (SEM) 来识别影响脱的因素.
主要成果:
- 与单独使用WBR相比,WBR+B+SL组合实现了最高的NRE (23%的改善) 和NRR (48%的改善).
- 在较短的HRT中,B和SL的益处更明显.
- SEM分析显示,SL添加降低了溶解氧,液压导电性和pH值,同时增加了溶解有机碳,增强了脱.
结论:
- 回收生物炭和化液是一种可行的策略,可以显著提高木片生物反应器中酸盐的去除.
- 生物炭和料液的协同效应通过优化关键生物反应器参数来改善脱.
- 这种方法提供了一个可持续的,双赢的解决方案,用于在水处理过程中有效地去除酸盐.
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